Unfortunately, FX Max doesn't work on Macs yet... but they've been saying for a while that they're working on a Mac version for a while now. I don't know of anything else that will send the audio over LAN.
You could try VST wrapping wormhole. Hypothetically it could work. I'd love someone to try this one day (I am a little hesitant about getting too fancy with my PT rig these days....) In fairness some VST wrapped plugs work fine inside PT. Often better than RTAS stuff.